I'm trying to find text(as blob and not OCR) within a blob to inspect its quality. But i'm unable to understand how to do that.Attaching an image for reference.I was able to detect and number the outer blob(yellow) and find its information. But I also want to detect the text within the yellow blob and check its quality.How do I do this?

I created another set of calculations and extracted the text using the GS/threshold/blobsize filters.I got the text that I wanted as well as the yellow blob details.What im trying to do now is, calculate the result of a particular set of blobs(Z51 from one yellow circle), how can I get a combined data for those 3 blobs instead of all the blobs(24 letters) in the image. I can indivisually check the blob information of each letter based on their ID, but how do I group the 3 blobs as 1 ID.?

You can not group them with the provided functionality. You get X/Y coordinates and size for each blob - this may help you to build some grouping logic on your side. But from the Blob Counter point of view those will be separate blobs.